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    <h6 id="header">RMagick 0.0.0 User's Guide and Reference</h6>

    <div class="nav">&laquo;&nbsp;<a href="info.html">Prev</a> | <a href="index.html">Contents</a> | <a href="rvgtut.html">Next</a>&nbsp;&raquo;</div>

    <h1>Constants</h1>

    <div id="toc">
      <h2>Table of Contents</h2>

      <h3>Constants</h3>

      <div class="toccol">
        <ul>
          <li><a href="#Miscellaneous_constants">Miscellaneous constants</a></li>

          <li><a href="#AlignType">AlignType</a></li>

          <li><a href="#AlphaChannelOption">AlphaChannelOption</a></li>

          <li><a href="#AnchorType">AnchorType</a></li>

          <li><a href="#ChannelType">ChannelType</a></li>

          <li><a href="#ClassType">ClassType</a></li>

          <li><a href="#ColorspaceType">ColorspaceType</a></li>

          <li><a href="#ComplianceType">ComplianceType</a></li>

          <li><a href="#CompositeOperator">CompositeOperator</a></li>

          <li><a href="#CompressionType">CompressionType</a></li>

          <li><a href="#DecorationType">DecorationType</a></li>

          <li><a href="#DisposeType">DisposeType</a></li>

          <li><a href="#DistortMethod">DistortMethod</a></li>
        </ul>
      </div>

      <div class="toccol">
        <ul>
          <li><a href="#DitherMethod">DitherMethod</a></li>

          <li><a href="#EndianType">EndianType</a></li>

          <li><a href="#FilterType">FilterType</a></li>

          <li><a href="#GeometryFlags">GeometryFlags</a></li>

          <li><a href="#GravityType">GravityType</a></li>

          <li><a href="#ImageType">ImageType</a></li>

          <li><a href="#InterlaceType">InterlaceType</a></li>

          <li><a href="#KernelInfoType">KernelInfoType</a></li>

          <li><a href="#MagickFunction">MagickFunction</a></li>

          <li><a href="#MetricType">MetricType</a></li>

          <li><a href="#MorphologyMethod">MorphologyMethod</a></li>

          <li><a href="#NoiseType">NoiseType</a></li>

          <li><a href="#Opacity">Opacity</a></li>
        </ul>
      </div>

      <div class="toccol">
        <ul>
          <li><a href="#OrientationType">OrientationType</a></li>

          <li><a href="#PaintMethod">PaintMethod</a></li>

          <li><a href="#PixelInterpolateMethod">PixelInterpolateMethod</a></li>

          <li><a href="#PreviewType">PreviewType</a></li>

          <li><a href="#QuantumExpressionOperator">QuantumExpressionOperator</a></li>

          <li><a href="#RenderingIntent">RenderingIntent</a></li>

          <li><a href="#ResolutionType">ResolutionType</a></li>

          <li><a href="#SparseColorMethod">SparseColorMethod</a></li>

          <li><a href="#SpreadMethod">SpreadMethod</a></li>

          <li><a href="#StretchType">StretchType</a></li>

          <li><a href="#StorageType">StorageType</a></li>

          <li><a href="#StyleType">StyleType</a></li>

          <li><a href="#VirtualPixelMethod">VirtualPixelMethod</a></li>

          <li><a href="#WeightType">WeightType</a></li>
        </ul>
      </div>
    </div>

    <h2 class="methods">Constants</h2>

    <h3 class="const" style="margin-top: 0" id="Miscellaneous_constants">Miscellaneous constants</h3>

    <dl>
      <dt>Long_version</dt>

      <dd>
        An extended form of the <code>Version</code> constant with the format shown here:<br />
        <code
          >This is RMagick 5.2.0 ($Date: 2009/12/20 02:33:33 $) Copyright (C) 2009 by Timothy P. Hunter<br />
          Built with ImageMagick 7.1.1-8 Q16-HDRI x86_64 21129 https://imagemagick.org<br />
          Built for ruby 3.2.2<br />
          Web page: https://rmagick.github.io/</code
        >
      </dd>

      <dt>Magick_version</dt>

      <dd>
        The ImageMagick version string. This has the form:<br />
        <code>@(#)ImageMagick X.Y.Z MM/DD/YY Q:16 https://www.imagemagick.org</code>
      </dd>

      <dt>MANAGED_MEMORY</dt>

      <dd>
        If <code>true</code>, RMagick is using Ruby managed memory for all allocations. If <code>false</code>, RMagick allocates memory for objects directly
        from the operating system. You can enable RMagick to use Ruby managed memory (when built with ImageMagick 6.4.0-11 and later) by setting
        <pre>

RMAGICK_ENABLE_MANAGED_MEMORY = true
</pre
        >
        <em>before</em> requiring RMagick.
      </dd>

      <dt>QuantumRange</dt>

      <dd>
        The maximum value of a <em>Quantum</em>. A quantum is one of the red, green, blue, or opacity elements of a pixel in the RGB colorspace, or cyan,
        yellow, magenta, or black elements in the CYMK colorspace.
      </dd>

      <dt>QuantumDepth</dt>

      <dd>
        The number of bits in a quantum. The relationship between QuantumDepth and QuantumRange is summarized in this table.

        <table summary="number of bits in a quantum" id="maxrgb">
          <tr>
            <th>QuantumDepth</th>

            <th>QuantumRange</th>
          </tr>

          <tr>
            <td>8</td>

            <td>255</td>
          </tr>

          <tr>
            <td>16</td>

            <td>65535</td>
          </tr>

          <tr>
            <td>32</td>

            <td>4294967295</td>
          </tr>
        </table>
      </dd>

      <dt>Version</dt>

      <dd>
        The RMagick version string. This has the form:<br />
        <code>RMagick 2.0.0</code>
      </dd>
    </dl>

    <h3 class="const" id="AlignType">AlignType</h3>

    <p>Specify text alignment. See <a href="draw.html#Draw.align_eq">align=</a>, <a href="draw.html#Draw.text_align">text_align</a>.</p>

    <dl>
      <dt>UndefinedAlign</dt>

      <dd>No alignment specified. Equivalent to LeftAlign.</dd>

      <dt>LeftAlign</dt>

      <dd>Align the leftmost part of the text to the starting point.</dd>

      <dt>CenterAlign</dt>

      <dd>Center the text around the starting point.</dd>

      <dt>RightAlign</dt>

      <dd>Align the rightmost part of the text to the starting point.</dd>
    </dl>

    <h3 class="const" id="AlphaChannelOption">AlphaChannelOption</h3>

    <p>Specify alpha channel option. See <a href="image1.html#alpha">Image#alpha</a>.</p>

    <dl>
      <dt>UndefinedAlphaChannel</dt>

      <dt>ActivateAlphaChannel</dt>

      <dt>DeactivateAlphaChannel</dt>

      <dt>SetAlphaChannel</dt>

      <dt>RemoveAlphaChannel</dt>

      <dt>CopyAlphaChannel</dt>

      <dt>ExtractAlphaChannel</dt>

      <dt>OpaqueAlphaChannel</dt>

      <dt>ShapeAlphaChannel</dt>

      <dt>TransparentAlphaChannel</dt>

      <dt>BackgroundAlphaChannel</dt>

      <dt>AssociateAlphaChannel</dt>

      <dt>DisassociateAlphaChannel</dt>

      <dt>OnAlphaChannel</dt>

      <dt>OffAlphaChannel</dt>
    </dl>

    <h3 class="const" id="AnchorType">AnchorType</h3>

    <p>Specify text anchor. See <a href="draw.html#text_anchor">Draw#text_anchor</a>.</p>

    <dl>
      <dt>StartAnchor</dt>

      <dt>MiddleAnchor</dt>

      <dt>EndAnchor</dt>
    </dl>

    <h3 class="const" id="ChannelType">ChannelType</h3>

    <p>
      Specify an image channel. A channel is a color component of a pixel. In the RGB colorspace the channels are red, green, and blue. There may also be an
      alpha (transparency/opacity) channel. In the CMYK colorspace the channels area cyan, magenta, yellow, and black. In the HSL colorspace the channels are
      hue, saturation, and lightness. In the Gray colorspace the only channel is gray. See
      <a href="image1.html#channel">Image#channel</a> and <a href="info.html#channel">Image::Info#channel=</a>.
    </p>

    <dl>
      <dt>UndefinedChannel</dt>

      <dt>RedChannel</dt>

      <dt>GreenChannel</dt>

      <dt>BlueChannel</dt>

      <dt>CyanChannel</dt>

      <dt>MagentaChannel</dt>

      <dt>YellowChannel</dt>

      <dt>BlackChannel</dt>

      <dt>OpacityChannel</dt>

      <dt>AllChannels</dt>

      <dd>In the RGB colorspace, the red, blue, green, and alpha channels. In the CMYK colorspace, the cyan, magenta, yellow, and black channels.</dd>

      <dt>GrayChannel</dt>

      <dt>CompositeChannels</dt>

      <dt>TrueAlphaChannel</dt>

      <dt>RGBChannels</dt>

      <dt>GrayChannels</dt>

      <dt>SyncChannels</dt>

      <dt>AlphaChannel</dt>

      <dd>Same as OpacityChannel</dd>

      <dt>DefaultChannels</dt>

      <dd>Same as AllChannels, excluding OpacityChannel</dd>

      <dt>HueChannel</dt>

      <dt>LuminosityChannel</dt>

      <dt>SaturationChannel</dt>

      <dt>IndexChannel</dt>
    </dl>

    <h3 class="const" id="ClassType">ClassType</h3>

    <p>
      Specify the image storage class. See
      <a href="imageattrs.html#class_type">class_type</a>.
    </p>

    <dl>
      <dt>UndefinedClass</dt>

      <dd>No storage class has been specified.</dd>

      <dt>DirectClass</dt>

      <dd class="imquote">Image is composed of pixels which represent literal color values.</dd>

      <dt>PseudoClass</dt>

      <dd class="imquote">Image is composed of pixels which specify an index in a color palette.</dd>
    </dl>

    <h3 class="const" id="ColorspaceType">ColorspaceType</h3>

    <p class="imquote">
      Specify the colorspace that quantization (color reduction and mapping) is done under or to specify the colorspace when encoding an output image.
      Colorspaces are ways of describing colors to fit the requirements of a particular application (e.g. Television, offset printing, color monitors).&nbsp;
      Color reduction, by default, takes place in the RGBColorspace. Empirical evidence suggests that distances in color spaces such as YUVColorspace or
      YIQColorspace correspond to perceptual color differences more closely than do distances in RGB space. These color spaces may give better results when
      color reducing an image.
    </p>

    <p>
      <span class="imquote"
        >When encoding an output image, the colorspaces RGBColorspace, CMYKColorspace, and GRAYColorspace may be specified. The CMYKColorspace option is only
        applicable when writing TIFF, JPEG, and Adobe Photoshop bitmap (PSD) files.</span
      >
      See <a href="imageattrs.html#colorspace">colorspace</a>.
    </p>

    <p>Each version of ImageMagick defines a subset of the colorspaces listed below. To list the subset supported by your version, issue the command:</p>
    <pre class="example">
ruby -rRMagick -e"Magick::ColorspaceType.values {|cs| puts cs}"
</pre
    >

    <dl>
      <dt>UndefinedColorspace</dt>

      <dd>No colorspace has been specified.</dd>

      <dt>CMYColorspace</dt>

      <dt>CMYKColorspace</dt>

      <dd class="imquote">
        Cyan-Magenta-Yellow-Black colorspace. CYMK is a subtractive color system used by printers and photographers for the rendering of colors with ink or
        emulsion, normally on a white surface.
      </dd>

      <dt>GRAYColorspace</dt>

      <dd>Full-range grayscale</dd>

      <dt>HSBColorspace</dt>

      <dt>HSLColorspace</dt>

      <dd>Hue, saturation, luminosity</dd>

      <dt>HWBColorspace</dt>

      <dd>Hue, whiteness, blackness</dd>

      <dt>LABColorspace</dt>

      <dt>LogColorspace</dt>

      <dt>OHTAColorspace</dt>

      <dt>RGBColorspace</dt>

      <dd class="imquote">Red-Green-Blue colorspace</dd>

      <dt>SRGBColorspace</dt>

      <dd>
        Kodak PhotoCD sRGB. In ImageMagick, this constant is named sRGBColorspace, but since Ruby constants must start with an uppercase letter, I had to change
        it.
      </dd>

      <dt>TransparentColorspace</dt>

      <dd class="imquote">The Transparent color space behaves uniquely in that it preserves the matte channel of the image if it exists.</dd>

      <dt>XYZColorspace</dt>

      <dd>CIE XYZ</dd>

      <dt>YCbCrColorspace</dt>

      <dt>YCCColorspace</dt>

      <dd>Kodak PhotoCD PhotoYCC</dd>

      <dt>YIQColorspace</dt>

      <dt>YPbPrColorspace</dt>

      <dt>YUVColorspace</dt>

      <dd class="imquote">Y-signal, U-signal, and V-signal colorspace. YUV is most widely used to encode color for use in television transmission.</dd>
    </dl>

    <p>The colorspaces in this group are typically associated with the DPX and Cineon image formats used in the motion picture industry.</p>

    <dl>
      <dt>Rec601LumaColorspace</dt>

      <dd>Luma (Y) according to ITU-R 601</dd>

      <dt>Rec601YCbCrColorspace</dt>

      <dd>YCbCr according to ITU-R 601</dd>

      <dt>Rec709LumaColorspace</dt>

      <dd>Luma (Y) according to ITU-R 709</dd>

      <dt>Rec709YCbCrColorspace</dt>

      <dd>YCbCr according to ITU-R 709</dd>

      <dt>LuvColorspace</dt>

      <dt>HCLColorspace</dt>

      <dt>LCHColorspace</dt>

      <dt>LMSColorspace</dt>

      <dt>LCHabColorspace</dt>

      <dt>LCHuvColorspace</dt>

      <dt>ScRGBColorspace</dt>

      <dt>HSIColorspace</dt>

      <dt>HSVColorspace</dt>

      <dt>HCLpColorspace</dt>

      <dt>YDbDrColorspace</dt>

      <dt>XyYColorspace</dt>

      <dt>LinearGRAYColorspace</dt>

      <dt>JzazbzColorspace</dt>
    </dl>

    <h3 class="const" id="ComplianceType">ComplianceType</h3>

    <p>
      Specify the color standard from which color names are chosen. See
      <a href="struct.html#Pixel">to_color</a>.
    </p>

    <dl>
      <dt>SVGCompliance</dt>

      <dd>Adhere to SVG color standard.</dd>

      <dt>X11Compliance</dt>

      <dd>Adhere to X11 color standard.</dd>

      <dt>XPMCompliance</dt>

      <dd>Adhere to XPM color standard.</dd>

      <dt>AllCompliance</dt>

      <dd>The union of the 3 color standards.</dd>

      <dt>UndefinedCompliance</dt>

      <dt>NoCompliance</dt>
    </dl>

    <h3 class="const" id="CompositeOperator">CompositeOperator</h3>

    <p>
      <span class="imquote"
        >Select the image composition algorithm used to compose a <code>composite image</code> with a <code>image</code>. By default, each of the
        <code>composite image</code> pixels are replaced by the corresponding <code>image</code> tile pixel. Specify <code>CompositeOperator</code> to select a
        different algorithm.</span
      >
      See <a href="image1.html#composite">composite</a>.
    </p>

    <dl>
      <dt>UndefinedCompositeOp</dt>

      <dd>No composite operator has been specified.</dd>

      <dt>AddCompositeOp</dt>

      <dd class="imquote">The result of <code>composite image</code> + <code>image</code>, with overflow wrapping around (mod 256).</dd>

      <dt>AtopCompositeOp</dt>

      <dd class="imquote">
        The result is the same shape as <code>image</code>, with <code>composite image</code> obscuring <code>image</code> where the image shapes overlap. Note
        that this differs from OverCompositeOp because the portion of <code>composite image</code> outside of <code>image</code>'s shape does not appear in the
        result.
      </dd>

      <dt>BlendCompositeOp</dt>

      <dt>BlurCompositeOp</dt>

      <dd>?</dd>

      <dt>BumpmapCompositeOp</dt>

      <dd class="imquote">The result <code>image</code> shaded by <code>composite image</code>.</dd>

      <dt>ChangeMaskCompositeOp</dt>

      <dd class="imquote">
        Replace any destination pixel that is the similar to the source image's pixel (as defined by the current fuzz factor), with transparency.
      </dd>

      <dt>ClearCompositeOp</dt>

      <dd>Make the target image transparent. The composite image is ignored.</dd>

      <dt>ColorBurnCompositeOp</dt>

      <dd class="imquote">Darkens the destination color to reflect the source color. Painting with white produces no change.</dd>

      <dt>ColorDodgeCompositeOp</dt>

      <dd class="imquote">Brightens the destination color to reflect the source color. Painting with black produces no change.</dd>

      <dt>ColorizeCompositeOp</dt>

      <dd class="imquote">
        Each pixel in the result image is the combination of the brightness of the target image and the saturation and hue of the composite image. This is the
        <em>opposite</em> of LuminizeCompositeOp.
      </dd>

      <dt>CopyAlphaCompositeOp</dt>

      <dd>
        If the composite image's
        <a href="imageattrs.html#matte">matte</a> attribute is <code>true</code>, copy the opacity channel from the composite image to the target image.
        Otherwise, set the target image pixel's opacity to the intensity of the corresponding pixel in the composite image.
      </dd>

      <dt>CopyCompositeOp</dt>

      <dd>Replace the target image with the composite image.</dd>

      <dt>CopyBlackCompositeOp</dt>

      <dd>Copy the black channel from the composite image to the target image.</dd>

      <dt>CopyBlueCompositeOp</dt>

      <dd>Copy the blue channel from the composite image to the target image.</dd>

      <dt>CopyCyanCompositeOp</dt>

      <dd>Copy the cyan channel from the composite image to the target image.</dd>

      <dt>CopyGreenCompositeOp</dt>

      <dd>Copy the green channel from the composite image to the target image.</dd>

      <dt>CopyMagentaCompositeOp</dt>

      <dd>Copy the magenta channel from the composite image to the target image.</dd>

      <dt>CopyRedCompositeOp</dt>

      <dd>Copy the red channel from the composite image to the target image.</dd>

      <dt>CopyYellowCompositeOp</dt>

      <dd>Copy the yellow channel from the composite image to the target image.</dd>

      <dt>DarkenCompositeOp</dt>

      <dd>Replace target image pixels with darker pixels from the composite image.</dd>

      <dt>DarkenIntensityCompositeOp</dt>

      <dt>DifferenceCompositeOp</dt>

      <dd class="imquote">The result of abs(<code>composite image</code> - <code>image</code>). This is useful for comparing two very similar images.</dd>

      <dt>DisplaceCompositeOp</dt>

      <dd>Displace target image pixels as defined by a displacement map. The operator used by the <a href="image1.html#displace">displace</a> method.</dd>

      <dt>DissolveCompositeOp</dt>

      <dd>
        The operator used in the
        <a href="image1.html#dissolve">dissolve</a> method.
      </dd>

      <dt>DistortCompositeOp</dt>

      <dd>?</dd>

      <dt>DivideDstCompositeOp</dt>

      <dt>DivideSrcCompositeOp</dt>

      <dt>DstCompositeOp</dt>

      <dd class="imquote">The destination is left untouched.</dd>

      <dt>DstAtopCompositeOp</dt>

      <dd class="imquote">The part of the destination lying inside of the source is composited over the source and replaces the destination.</dd>

      <dt>DstInCompositeOp</dt>

      <dd class="imquote">The part of the destination lying inside of the source replaces the destination.</dd>

      <dt>DstOutCompositeOp</dt>

      <dd class="imquote">The part of the destination lying outside of the source replaces the destination.</dd>

      <dt>DstOverCompositeOp</dt>

      <dd class="imquote">The destination is composited over the source and the result replaces the destination.</dd>

      <dt>ExclusionCompositeOp</dt>

      <dd class="imquote">
        Produces an effect similar to that of 'difference', but appears as lower contrast. Painting with white inverts the destination color. Painting with
        black produces no change.
      </dd>

      <dt>HardLightCompositeOp</dt>

      <dd class="imquote">
        Multiplies or screens the colors, dependent on the source color value. If the source color is lighter than 0.5, the destination is lightened as if it
        were screened. If the source color is darker than 0.5, the destination is darkened, as if it were multiplied. The degree of lightening or darkening is
        proportional to the difference between the source color and 0.5. If it is equal to 0.5 the destination is unchanged. Painting with pure black or white
        produces black or white.
      </dd>

      <dt>HardMixCompositeOp</dt>

      <dt>HueCompositeOp</dt>

      <dd class="imquote">
        Each pixel in the result image is the combination of the hue of the target image and the saturation and brightness of the composite image.
      </dd>

      <dt>InCompositeOp</dt>

      <dd class="imquote">
        The result is simply <code>composite image</code> cut by the shape of <code>image</code>. None of the image data of <code>image</code> is included in
        the result.
      </dd>

      <dt>LightenCompositeOp</dt>

      <dd>Replace target image pixels with lighter pixels from the composite image.</dd>

      <dt>LightenIntensityCompositeOp</dt>

      <dt>LinearBurnCompositeOp</dt>

      <dd>Same as <code>LinearDodgeCompositeOp</code>, but also subtract one from the result. Sort of a additive 'Screen' of the images.</dd>

      <dt>LinearDodgeCompositeOp</dt>

      <dd class="imquote">
        This is equivelent to <code>PlusCompositeOp</code> in that the color channels are simply added, however it does not "plus" the alpha channel, but uses
        the normal <code>OverCompositeOp</code> alpha blending, which transparencies are involved. Produces a sort of additive multiply-like result.
      </dd>

      <dt>LinearLightCompositeOp</dt>

      <dd class="imquote">Increase contrast slightly with an impact on the foreground's tonal values.</dd>

      <dt>LuminizeCompositeOp</dt>

      <dd class="imquote">
        Each pixel in the result image is the combination of the brightness of the composite image and the saturation and hue of the target image. This is the
        <em>opposite</em> of ColorizeCompositeOp.
      </dd>

      <dt>MathematicsCompositeOp</dt>

      <dt>MinusDstCompositeOp</dt>

      <dt>MinusSrcCompositeOp</dt>

      <dt>ModulateCompositeOp</dt>

      <dd>Used by the <a href="image3.html#watermark">watermark</a> method.</dd>

      <dt>ModulusAddCompositeOp</dt>

      <dt>ModulusSubtractCompositeOp</dt>

      <dt>MultiplyCompositeOp</dt>

      <dd class="imquote">
        Multiplies the color of each target image pixel by the color of the corresponding composite image pixel. The result color is always darker.
      </dd>

      <dt>NoCompositeOp</dt>

      <dd>No composite operator has been specified.</dd>

      <dt>OutCompositeOp</dt>

      <dd class="imquote">The resulting image is <code>composite image</code> with the shape of <code>image</code> cut out.</dd>

      <dt>OverCompositeOp</dt>

      <dd>
        <span class="imquote"
          >The result is the union of the the two image shapes with <code>composite image</code> obscuring <code>image</code> in the region of overlap.</span
        >
        The matte channel of the composite image is respected, so that if the composite pixel is part or all transparent, the corresponding image pixel will
        show through.
      </dd>

      <dt>OverlayCompositeOp</dt>

      <dd class="imquote">
        Multiplies or screens the colors, dependent on the destination color. Source colors overlay the destination whilst preserving its highlights and
        shadows. The destination color is not replaced, but is mixed with the source color to reflect the lightness or darkness of the destination.
      </dd>

      <dt>PegtopLightCompositeOp</dt>

      <dd class="imquote">
        Almost equivalent to <code>SoftLightCompositeOp</code>, but using a continuious mathematical formula rather than two conditionally selected formulae.
      </dd>

      <dt>PinLightCompositeOp</dt>

      <dd class="imquote">
        Similar to <code>HardLightCompositeOp</code>, but using sharp linear shadings, to similate the effects of a strong 'pinhole' light source.
      </dd>

      <dt>PlusCompositeOp</dt>

      <dd class="imquote">
        The result is just the sum of the image data. Output values are cropped to 255 (no overflow). This operation is independent of the matte channels.
      </dd>

      <dt>ReplaceCompositeOp</dt>

      <dd class="imquote">The resulting image is image replaced with composite image. Here the matte information is ignored.</dd>

      <dt>SaturateCompositeOp</dt>

      <dd>Each pixel in the result image is the combination of the saturation of the target image and the hue and brightness of the composite image.</dd>

      <dt>ScreenCompositeOp</dt>

      <dd>Multiplies the inverse of each image's color information.</dd>

      <dt>SoftLightCompositeOp</dt>

      <dd class="imquote">
        Darkens or lightens the colors, dependent on the source color value. If the source color is lighter than 0.5, the destination is lightened. If the
        source color is darker than 0.5, the destination is darkened, as if it were burned in. The degree of darkening or lightening is proportional to the
        difference between the source color and 0.5. If it is equal to 0.5, the destination is unchanged. Painting with pure black or white produces a
        distinctly darker or lighter area, but does not result in pure black or white.
      </dd>

      <dt>SrcAtopCompositeOp</dt>

      <dd class="imquote">The part of the source lying inside of the destination is composited onto the destination.</dd>

      <dt>SrcCompositeOp</dt>

      <dd class="imquote">The source is copied to the destination. The destination is not used as input.</dd>

      <dt>SrcInCompositeOp</dt>

      <dd class="imquote">he part of the source lying inside of the destination replaces the destination.</dd>

      <dt>SrcOutCompositeOp</dt>

      <dd class="imquote">The part of the source lying outside of the destination replaces the destination.</dd>

      <dt>SrcOverCompositeOp</dt>

      <dd class="imquote">The source is composited over the destination.</dd>

      <dt>SubtractCompositeOp</dt>

      <dd class="imquote">
        The result of <code>composite image</code> - <code>image</code>, with underflow wrapping around (mod 256). The add and subtract operators can be used to
        perform reversable transformations.
      </dd>

      <dt>ThresholdCompositeOp</dt>

      <dd>?</dd>

      <dt>VividLightCompositeOp</dt>

      <dd class="imquote">A modified <code>LinearLightCompositeOp</code> designed to preserve very stong primary and secondary colors in the image.</dd>

      <dt>XorCompositeOp</dt>

      <dd class="imquote">
        The result is the image data from both <code>composite image</code> and <code>image</code> that is outside the overlap region. The overlap region will
        be blank.
      </dd>
    </dl>

    <h3 class="const" id="CompressionType">CompressionType</h3>

    <p>
      <span class="imquote"
        >Express the desired compression type when encoding an image. Be aware that most image types only support a sub-set of the available compression types.
        If the compression type specified is incompatible with the image, ImageMagick selects a compression type compatible with the image type.</span
      >
      See <a href="imageattrs.html#compression">compression</a>.
    </p>

    <dl>
      <dt>UndefinedCompression</dt>

      <dd>No compression type has been specified.</dd>

      <dt>NoCompression</dt>

      <dd>The default for most formats.</dd>

      <dt>B44Compression</dt>

      <dd>Available in ImageMagick 6.5.5-4 and later.</dd>

      <dt>B44ACompression</dt>

      <dd>Available in ImageMagick 6.5.5-4 and later.</dd>

      <dt>BZipCompression</dt>

      <dd class="imquote">BZip (Burrows-Wheeler block-sorting text compression algorithm and Huffman coding) as used by bzip2 utilities</dd>

      <dt>DXT1Compression</dt>

      <dd>Available in ImageMagick 6.3.9-3 and later.</dd>

      <dt>DXT3Compression</dt>

      <dd>Available in ImageMagick 6.3.9-3 and later.</dd>

      <dt>DXT5Compression</dt>

      <dd>Available in ImageMagick 6.3.9-3 and later.</dd>

      <dt>FaxCompression</dt>

      <dd class="imquote">CCITT Group 3 FAX compression</dd>

      <dt>Group4Compression</dt>

      <dd class="imquote">CCITT Group 4 FAX compression (used only for TIFF)</dd>

      <dt>JPEGCompression</dt>

      <dd>
        JPEG compression. See
        <a href="http://www.faqs.org/faqs/jpeg-faq/part1/">The JPEG image compression FAQ</a>.
      </dd>

      <dt>JPEG2000Compression</dt>

      <dd>JPEG2000 compression for compressed PDF images.</dd>

      <dt>LosslessJPEGCompression</dt>

      <dd>This compression format is almost never used.</dd>

      <dt>LZWCompression</dt>

      <dd class="imquote">Lempel-Ziv-Welch (LZW) compression</dd>

      <dt>PizCompression</dt>

      <dd>Available in ImageMagick 6.5.5-4 and later.</dd>

      <dt>Pxr24Compression</dt>

      <dd>Available in ImageMagick 6.5.5-4 and later.</dd>

      <dt>RLECompression</dt>

      <dd>
        See the Wikipedia page for
        <a href="https://en.wikipedia.org/wiki/Run_length_encoding">Run-length encoding</a>.
      </dd>

      <dt>ZipCompression</dt>

      <dd class="imquote">Lempel-Ziv compression (LZ77) as used in PKZIP and GNU gzip.</dd>

      <dt>ZipSCompression</dt>

      <dd>Available in ImageMagick 6.5.5-4 and later.</dd>

      <dt>LZMACompression</dt>

      <dt>JBIG1Compression</dt>

      <dt>JBIG2Compression</dt>
    </dl>

    <h3 class="const" id="DecorationType">DecorationType</h3>

    <p>
      Use with the <a href="draw.html#decorate">decorate=</a> method in the Draw class to specify the text decoration for the
      <a href="draw.html#annotate">annotate</a> method.
    </p>

    <dl>
      <dt>NoDecoration</dt>

      <dd>Don't decorate the text.</dd>

      <dt>UnderlineDecoration</dt>

      <dd>Underline the text.</dd>

      <dt>OverlineDecoration</dt>

      <dd>Overline the text.</dd>

      <dt>LineThroughDecoration</dt>

      <dd>Draw a horizontal line through the middle of the text.</dd>
    </dl>

    <h3 class="const" id="DisposeType">DisposeType</h3>

    <p>The value of the <a href="imageattrs.html#dispose">dispose</a> attribute.</p>

    <dl>
      <dt>UnrecognizedDispose</dt>

      <dt>UndefinedDispose</dt>

      <dd>No disposal specified.</dd>

      <dt>NoneDispose</dt>

      <dd>Do not dispose between frames.</dd>

      <dt>BackgroundDispose</dt>

      <dd>Overwrite the image area with the background color.</dd>

      <dt>PreviousDispose</dt>

      <dd>Overwrite the image area with what was there prior to rendering the image.</dd>
    </dl>

    <h3 class="const" id="DistortMethod">DistortMethod</h3>

    <p>The value of the <a href="image1.html#distort">Image#distort</a> argument.</p>

    <dl>
      <dt>UndefinedDistortion</dt>

      <dt>AffineDistortion</dt>

      <dt>AffineProjectionDistortion</dt>

      <dt>ArcDistortion</dt>

      <dt>PolarDistortion</dt>

      <dt>DePolarDistortion</dt>

      <dt>BarrelDistortion</dt>

      <dt>BilinearDistortion</dt>

      <dt>BilinearForwardDistortion</dt>

      <dt>BilinearReverseDistortion</dt>

      <dt>PerspectiveDistortion</dt>

      <dt>PerspectiveProjectionDistortion</dt>

      <dt>PolynomialDistortion</dt>

      <dt>ScaleRotateTranslateDistortion</dt>

      <dt>ShepardsDistortion</dt>

      <dt>BarrelInverseDistortion</dt>

      <dt>Cylinder2PlaneDistortion</dt>

      <dt>Plane2CylinderDistortion</dt>

      <dt>ResizeDistortion</dt>

      <dt>SentinelDistortion</dt>
    </dl>

    <h3 class="const" id="DitherMethod">DitherMethod</h3>

    <p>
      Specify the method of dithering for <a href="image1.html#remap">remap</a>, <a href="image3.html#quantize">quantize</a>,
      <a href="image3.html#posterize">posterize</a>, etc.
    </p>

    <dl>
      <dt>UndefinedDitherMethod</dt>

      <dt>NoDitherMethod</dt>

      <dt>RiemersmaDitherMethod</dt>

      <dt>FloydSteinbergDitherMethod</dt>
    </dl>

    <h3 class="const" id="EndianType">EndianType</h3>

    <p>The value of the <a href="info.html#endian">endian</a> attribute.</p>

    <dl>
      <dt>UndefinedEndian</dt>

      <dt>LSBEndian</dt>

      <dt>MSBEndian</dt>
    </dl>

    <h3 class="const" id="FilterType">FilterType</h3>

    <p>
      <span class="imquote"
        >Used to adjust the filter algorithm used when resizing images. Different filters experience varying degrees of success with various images and can take
        significantly different amounts of processing time. ImageMagick uses the LanczosFilter by default since this filter has been shown to provide the best
        results for most images in a reasonable amount of time. Other filter types (e.g. TriangleFilter) may execute much faster but may show artifacts when the
        image is re-sized or around diagonal lines. The only way to be sure is to test the filter with sample images.</span
      >
      See <a href="image3.html#resize">resize</a>.
    </p>

    <dl>
      <dt>UndefinedFilter</dt>

      <dt>PointFilter</dt>

      <dt>BoxFilter</dt>

      <dt>TriangleFilter</dt>

      <dt>HermiteFilter</dt>

      <dt>HanningFilter</dt>

      <dt>HammingFilter</dt>

      <dt>BlackmanFilter</dt>

      <dt>GaussianFilter</dt>

      <dt>QuadraticFilter</dt>

      <dt>CubicFilter</dt>

      <dt>CatromFilter</dt>

      <dt>MitchellFilter</dt>

      <dt>LanczosFilter</dt>

      <dt>BesselFilter</dt>

      <dt>SincFilter</dt>

      <dt>KaiserFilter</dt>

      <dt>WelshFilter</dt>

      <dt>ParzenFilter</dt>

      <dt>LagrangeFilter</dt>

      <dt>BohmanFilter</dt>

      <dt>BartlettFilter</dt>

      <dt>JincFilter</dt>

      <dt>SincFastFilter</dt>

      <dt>LanczosSharpFilter</dt>

      <dt>Lanczos2Filter</dt>

      <dt>Lanczos2SharpFilter</dt>

      <dt>RobidouxFilter</dt>

      <dt>RobidouxSharpFilter</dt>

      <dt>CosineFilter</dt>

      <dt>SplineFilter</dt>

      <dt>LanczosRadiusFilter</dt>

      <dt>WelchFilter</dt>

      <dt>HannFilter</dt>
    </dl>

    <h3 class="const" id="GeometryFlags">GeometryFlags</h3>

    <dl>
      <dt>NoValue</dt>

      <dt>XValue</dt>

      <dt>XiValue</dt>

      <dt>YValue</dt>

      <dt>PsiValue</dt>

      <dt>WidthValue</dt>

      <dt>RhoValue</dt>

      <dt>HeightValue</dt>

      <dt>SigmaValue</dt>

      <dt>ChiValue</dt>

      <dt>XiNegative</dt>

      <dt>XNegative</dt>

      <dt>PsiNegative</dt>

      <dt>YNegative</dt>

      <dt>ChiNegative</dt>

      <dt>PercentValue</dt>

      <dt>AspectValue</dt>

      <dt>NormalizeValue</dt>

      <dt>LessValue</dt>

      <dt>GreaterValue</dt>

      <dt>MinimumValue</dt>

      <dt>CorrelateNormalizeValue</dt>

      <dt>AreaValue</dt>

      <dt>DecimalValue</dt>

      <dt>SeparatorValue</dt>

      <dt>AllValues</dt>
    </dl>

    <h3 class="const" id="GravityType">GravityType</h3>

    <p>
      <span class="imquote"
        >Specify positioning of an object (e.g. text, image) within a bounding region (e.g. an image). Gravity provides a convenient way to locate objects
        irrespective of the size of the bounding region, in other words, you don't need to provide absolute coordinates in order to position an object. A common
        default for gravity is <em>NorthWestGravity</em>.</span
      >
      See <a href="draw.html#annotate">annotate</a> and <a href="image1.html#composite">composite</a>.
    </p>

    <dl>
      <dt>UndefinedGravity</dt>

      <dt>ForgetGravity</dt>

      <dd class="imquote">Don't use gravity.</dd>

      <dt>NorthWestGravity</dt>

      <dd class="imquote">Position object at top-left of region</dd>

      <dt>NorthGravity</dt>

      <dd class="imquote">Position object at top-center of region</dd>

      <dt>NorthEastGravity</dt>

      <dd class="imquote">Position object at top-right of region</dd>

      <dt>WestGravity</dt>

      <dd class="imquote">Position object at left-center of region</dd>

      <dt>CenterGravity</dt>

      <dd class="imquote">Position object at center of region</dd>

      <dt>EastGravity</dt>

      <dd class="imquote">Position object at right-center of region</dd>

      <dt>SouthWestGravity</dt>

      <dd class="imquote">Position object at left-bottom of region</dd>

      <dt>SouthGravity</dt>

      <dd class="imquote">Position object at bottom-center of region</dd>

      <dt>SouthEastGravity</dt>

      <dd class="imquote">Position object at bottom-right of region</dd>
    </dl>

    <h3 class="const" id="ImageType">ImageType</h3>

    <p>
      Indicate
      <span class="imquote">the type classification of the image.</span> See <a href="imageattrs.html#image_type">image_type</a> and
      <a href="info.html#image_type_eq">image_type=</a>.
    </p>

    <dl>
      <dt>UndefinedType</dt>

      <dd>No type has been specified.</dd>

      <dt>BilevelType</dt>

      <dd class="imquote">Monochrome image</dd>

      <dt>GrayscaleType</dt>

      <dd class="imquote">Grayscale image</dd>

      <dt>PaletteType</dt>

      <dd class="imquote">Indexed color (palette) image</dd>

      <dt>PaletteMatteType</dt>

      <dd class="imquote">Indexed color (palette) image with opacity</dd>

      <dt>TrueColorType</dt>

      <dd class="imquote">Truecolor image</dd>

      <dt>TrueColorMatteType</dt>

      <dd class="imquote">Truecolor image with opacity</dd>

      <dt>ColorSeparationType</dt>

      <dd class="imquote">Cyan/Yellow/Magenta/Black (CYMK) image</dd>

      <dt>ColorSeparationMatteType</dt>

      <dt>OptimizeType</dt>

      <dt>PaletteBilevelMatteType</dt>

      <dt>GrayscaleAlphaType</dt>

      <dt>PaletteAlphaType</dt>

      <dt>TrueColorAlphaType</dt>

      <dt>ColorSeparationAlphaType</dt>

      <dt>PaletteBilevelAlphaType</dt>
    </dl>

    <h3 class="const" id="InterlaceType">InterlaceType</h3>

    <p>
      Specify
      <span class="imquote"
        >the ordering of the red, green, and blue pixel information in the image. Interlacing is usually used to make image information available to the user
        faster by taking advantage of the space vs time tradeoff. For example, interlacing allows images on the Web to be recognizable sooner and satellite
        images to accumulate/render with image resolution increasing over time. Use <code>LineInterlace</code> or <code>PlaneInterlace</code> to create an
        interlaced GIF or progressive JPEG image.</span
      >
      See <a href="imageattrs.html#interlace">interlace</a>.
    </p>

    <dl>
      <dt>UndefinedInterlace</dt>

      <dd>No interlace type has been specified.</dd>

      <dt>NoInterlace</dt>

      <dd class="imquote">Don't interlace image (RGBRGBRGBRGBRGBRGB...)</dd>

      <dt>LineInterlace</dt>

      <dd class="imquote">Use scanline interlacing (RRR...GGG...BBB...RRR...GGG...BBB...)</dd>

      <dt>PlaneInterlace</dt>

      <dd class="imquote">Use plane interlacing (RRRRRR...GGGGGG...BBBBBB...)</dd>

      <dt>PartitionInterlace</dt>

      <dd class="imquote">Similar to plane interlacing except that the different planes are saved to individual files (e.g. image.R, image.G, and image.B)</dd>

      <dt>GIFInterlace</dt>

      <dt>JPEGInterlace</dt>

      <dt>PNGInterlace</dt>

      <dd>See the ImageMagick documentation for the -interlace option.</dd>
    </dl>

    <h3 class="const" id="KernelInfoType">KernelInfoType</h3>

    <dl>
      <dt>UndefinedKernel</dt>

      <dt>UnityKernel</dt>

      <dt>GaussianKernel</dt>

      <dt>DoGKernel</dt>

      <dt>LoGKernel</dt>

      <dt>BlurKernel</dt>

      <dt>CometKernel</dt>

      <dt>LaplacianKernel</dt>

      <dt>SobelKernel</dt>

      <dt>FreiChenKernel</dt>

      <dt>RobertsKernel</dt>

      <dt>PrewittKernel</dt>

      <dt>CompassKernel</dt>

      <dt>KirschKernel</dt>

      <dt>DiamondKernel</dt>

      <dt>SquareKernel</dt>

      <dt>RectangleKernel</dt>

      <dt>OctagonKernel</dt>

      <dt>DiskKernel</dt>

      <dt>PlusKernel</dt>

      <dt>CrossKernel</dt>

      <dt>RingKernel</dt>

      <dt>PeaksKernel</dt>

      <dt>EdgesKernel</dt>

      <dt>CornersKernel</dt>

      <dt>DiagonalsKernel</dt>

      <dt>LineEndsKernel</dt>

      <dt>LineJunctionsKernel</dt>

      <dt>RidgesKernel</dt>

      <dt>ConvexHullKernel</dt>

      <dt>ThinSEKernel</dt>

      <dt>SkeletonKernel</dt>

      <dt>ChebyshevKernel</dt>

      <dt>ManhattanKernel</dt>

      <dt>OctagonalKernel</dt>

      <dt>EuclideanKernel</dt>

      <dt>UserDefinedKernel</dt>

      <dt>BinomialKernel</dt>
    </dl>

    <h3 class="const" id="MagickFunction">MagickFunction</h3>

    <p>The value of the <a href="image2.html#function_channel">Image#function_channel</a> argument.</p>

    <dl>
      <dt>UndefinedFunction</dt>

      <dt>PolynomialFunction</dt>

      <dt>SinusoidFunction</dt>

      <dt>ArcsinFunction</dt>

      <dt>ArctanFunction</dt>
    </dl>

    <p>
      For FilterInterpolatePixel, specify the filter with the
      <a href="imageattrs.html#filter">filter</a> attribute. Specify the sharpness with the <a href="imageattrs.html#blur">blur</a> attribute.
    </p>

    <h3 class="const" id="MetricType">MetricType</h3>

    <p>
      The distortion metric type. See
      <a href="image1.html#compare_channel">compare_channel</a>, <a href="image1.html#distortion_channel">distortion_channel</a>.
    </p>

    <dl>
      <dt>MeanAbsoluteErrorMetric</dt>

      <dt>MeanSquaredErrorMetric</dt>

      <dt>PeakAbsoluteErrorMetric</dt>

      <dt>PeakSignalToNoiseRatioMetric</dt>

      <dt>RootMeanSquaredErrorMetric</dt>
    </dl>

    <h3 class="const" id="MorphologyMethod">MorphologyMethod</h3>

    <dl>
      <dt>UndefinedMorphology</dt>

      <dt>ConvolveMorphology</dt>

      <dt>CorrelateMorphology</dt>

      <dt>ErodeMorphology</dt>

      <dt>DilateMorphology</dt>

      <dt>ErodeIntensityMorphology</dt>

      <dt>DilateIntensityMorphology</dt>

      <dt>DistanceMorphology</dt>

      <dt>OpenMorphology</dt>

      <dt>CloseMorphology</dt>

      <dt>OpenIntensityMorphology</dt>

      <dt>CloseIntensityMorphology</dt>

      <dt>SmoothMorphology</dt>

      <dt>EdgeInMorphology</dt>

      <dt>EdgeOutMorphology</dt>

      <dt>EdgeMorphology</dt>

      <dt>TopHatMorphology</dt>

      <dt>BottomHatMorphology</dt>

      <dt>HitAndMissMorphology</dt>

      <dt>ThinningMorphology</dt>

      <dt>ThickenMorphology</dt>

      <dt>VoronoiMorphology</dt>

      <dt>IterativeDistanceMorphology</dt>
    </dl>

    <h3 class="const" id="NoiseType">NoiseType</h3>

    <p>
      <span class="imquote">Select the type of noise to be added to the image.</span>
      See <a href="image1.html#add_noise">add_noise</a>.
    </p>

    <dl>
      <dt>UniformNoise</dt>

      <dt>GaussianNoise</dt>

      <dt>MultiplicativeGaussianNoise</dt>

      <dt>ImpulseNoise</dt>

      <dt>LaplacianNoise</dt>

      <dt>PoissonNoise</dt>

      <dt>RandomNoise</dt>
    </dl>

    <h3 class="const" id="Opacity">Opacity</h3>

    <p>
      represent the maximum and minimum levels of opacity. You can specify a partial level of opacity by choosing a number between OpaqueOpacity and
      TransparentOpacity. For example, 25% opacity is
      <code>abs(Magick::TransparentOpacity-Magick::OpaqueOpacity) * 0.25</code>
    </p>

    <dl>
      <dt>TransparentOpacity</dt>

      <dd>The minimum amount of opacity.</dd>

      <dt>OpaqueOpacity</dt>

      <dd>The maximum amount of opacity.</dd>
    </dl>

    <h3 class="const" id="OrientationType">OrientationType</h3>

    <p>
      Specify the orientation of the image pixels. See
      <a href="imageattrs.html#orientation">Image#orientation</a> and <a href="info.html#orientation">Info#orientation</a>. See
      <a href="https://jpegclub.org/exif_orientation.html">https://jpegclub.org/exif_orientation.html</a>
      for an explanation of these values.
    </p>

    <dl>
      <dt>UndefinedOrientation</dt>

      <dt>TopLeftOrientation</dt>

      <dt>TopRightOrientation</dt>

      <dt>BottomRightOrientation</dt>

      <dt>BottomLeftOrientation</dt>

      <dt>LeftTopOrientation</dt>

      <dt>RightTopOrientation</dt>

      <dt>RightBottomOrientation</dt>

      <dt>LeftBottomOrientation</dt>
    </dl>

    <h3 class="const" id="PaintMethod">PaintMethod</h3>

    <p class="imquote">
      Specify how pixel colors are to be replaced in the image. See
      <a href="image2.html#matte_floodfill">matte_floodfill</a> and <a href="image3.html#texture_floodfill">texture_floodfill</a>.
    </p>

    <dl>
      <dt>PointMethod</dt>

      <dd class="imquote">Replace pixel color at point.</dd>

      <dt>ReplaceMethod</dt>

      <dd class="imquote">Replace color for all image pixels matching color at point.</dd>

      <dt>FloodfillMethod</dt>

      <dd class="imquote">Replace color for pixels surrounding point until encountering pixel that fails to match color at point.</dd>

      <dt>FillToBorderMethod</dt>

      <dd class="imquote">Replace color for pixels surrounding point until encountering pixels matching border color.</dd>

      <dt>ResetMethod</dt>

      <dd class="imquote">Replace colors for <strong>all</strong> pixels in image with fill color.</dd>
    </dl>

    <h3 class="const" id="PixelInterpolateMethod">PixelInterpolateMethod</h3>

    <p>
      The pixel color interpolation method. See
      <a href="imageattrs.html#pixel_interpolation_method">pixel_interpolation_method</a>.
    </p>

    <dl>
      <dt>UndefinedInterpolatePixel</dt>

      <dt>AverageInterpolatePixel</dt>

      <dt>BilinearInterpolatePixel</dt>

      <dt>IntegerInterpolatePixel</dt>

      <dt>MeshInterpolatePixel</dt>

      <dt>NearestInterpolatePixel</dt>

      <dt>SplineInterpolatePixel</dt>

      <dt>Average9InterpolatePixel</dt>

      <dt>Average16InterpolatePixel</dt>

      <dt>BlendInterpolatePixel</dt>

      <dt>BackgroundInterpolatePixel</dt>

      <dt>CatromInterpolatePixel</dt>
    </dl>

    <h3 class="const" id="PreviewType">PreviewType</h3>

    <dl>
      <dt>UndefinedPreview</dt>

      <dt>RotatePreview</dt>

      <dt>ShearPreview</dt>

      <dt>RollPreview</dt>

      <dt>HuePreview</dt>

      <dt>SaturationPreview</dt>

      <dt>BrightnessPreview</dt>

      <dt>GammaPreview</dt>

      <dt>SpiffPreview</dt>

      <dt>DullPreview</dt>

      <dt>GrayscalePreview</dt>

      <dt>QuantizePreview</dt>

      <dt>DespecklePreview</dt>

      <dt>ReduceNoisePreview</dt>

      <dt>AddNoisePreview</dt>

      <dt>SharpenPreview</dt>

      <dt>BlurPreview</dt>

      <dt>ThresholdPreview</dt>

      <dt>EdgeDetectPreview</dt>

      <dt>SpreadPreview</dt>

      <dt>SolarizePreview</dt>

      <dt>ShadePreview</dt>

      <dt>RaisePreview</dt>

      <dt>SegmentPreview</dt>

      <dt>SwirlPreview</dt>

      <dt>ImplodePreview</dt>

      <dt>WavePreview</dt>

      <dt>OilPaintPreview</dt>

      <dt>CharcoalDrawingPreview</dt>

      <dt>JPEGPreview</dt>
    </dl>

    <h3 class="const" id="QuantumExpressionOperator">QuantumExpressionOperator</h3>

    <dl>
      <dt>UndefinedQuantumOperator</dt>

      <dt>AddQuantumOperator</dt>

      <dt>AndQuantumOperator</dt>

      <dt>DivideQuantumOperator</dt>

      <dt>LShiftQuantumOperator</dt>

      <dt>MaxQuantumOperator</dt>

      <dt>MinQuantumOperator</dt>

      <dt>MultiplyQuantumOperator</dt>

      <dt>OrQuantumOperator</dt>

      <dt>RShiftQuantumOperator</dt>

      <dt>SubtractQuantumOperator</dt>

      <dt>XorQuantumOperator</dt>

      <dt>PowQuantumOperator</dt>

      <dt>LogQuantumOperator</dt>

      <dt>ThresholdQuantumOperator</dt>

      <dt>ThresholdBlackQuantumOperator</dt>

      <dt>ThresholdWhiteQuantumOperator</dt>

      <dt>GaussianNoiseQuantumOperator</dt>

      <dt>ImpulseNoiseQuantumOperator</dt>

      <dt>LaplacianNoiseQuantumOperator</dt>

      <dt>MultiplicativeNoiseQuantumOperator</dt>

      <dt>PoissonNoiseQuantumOperator</dt>

      <dt>UniformNoiseQuantumOperator</dt>

      <dt>CosineQuantumOperator</dt>

      <dt>SetQuantumOperator</dt>

      <dt>SineQuantumOperator</dt>

      <dt>AddModulusQuantumOperator</dt>

      <dt>MeanQuantumOperator</dt>

      <dt>AbsQuantumOperator</dt>

      <dt>ExponentialQuantumOperator</dt>

      <dt>MedianQuantumOperator</dt>

      <dt>SumQuantumOperator</dt>

      <dt>RootMeanSquareQuantumOperator</dt>
    </dl>

    <h3 class="const" id="RenderingIntent">RenderingIntent</h3>

    <p>
      <span class="imquote"
        >Rendering intent is a concept defined by ICC Spec ICC.1:1998-09, "File Format for Color Profiles". ImageMagick uses RenderingIntent in order to support
        ICC Color Profiles.</span
      >
    </p>

    <p class="imquote">
      From the specification: "Rendering intent specifies the style of reproduction to be used during the evaluation of this profile in a sequence of profiles.
      It applies specifically to that profile in the sequence and not to the entire sequence. Typically, the user or application will set the rendering intent
      dynamically at runtime or embedding time."
    </p>

    <p>See <a href="imageattrs.html#rendering_intent">rendering_intent</a>.</p>

    <dl>
      <dt>UndefinedIntent</dt>

      <dd>No intent has been specified.</dd>

      <dt>SaturationIntent</dt>

      <dd class="imquote">
        A rendering intent that specifies the saturation of the pixels in the image is preserved perhaps at the expense of accuracy in hue and lightness.
      </dd>

      <dt>PerceptualIntent</dt>

      <dd class="imquote">
        A rendering intent that specifies the full gamut of the image is compressed or expanded to fill the gamut of the destination device. Gray balance is
        preserved but colorimetric accuracy might not be preserved.
      </dd>

      <dt>AbsoluteIntent</dt>

      <dd class="imquote">Absolute colorimetric</dd>

      <dt>RelativeIntent</dt>

      <dd class="imquote">Relative colorimetric</dd>
    </dl>

    <h3 class="const" id="ResolutionType">ResolutionType</h3>

    <p>
      <span class="imquote">By default, ImageMagick defines resolutions in pixels per inch. ResolutionType provides a means to adjust this.</span>
      See <a href="imageattrs.html#units">units</a>.
    </p>

    <dl>
      <dt>UndefinedResolution</dt>

      <dd>No resolution has been specified.</dd>

      <dt>PixelsPerInchResolution</dt>

      <dd class="imquote">Density specifications are specified in units of pixels per inch (English units).</dd>

      <dt>PixelsPerCentimeterResolution</dt>

      <dd class="imquote">Density specifications are specified in units of pixels per centimeter (metric units).</dd>
    </dl>

    <h3 class="const" id="SparseColorMethod">SparseColorMethod</h3>

    <dl>
      <dt>UndefinedColorInterpolate</dt>

      <dt>BarycentricColorInterpolate</dt>

      <dt>BilinearColorInterpolate</dt>

      <dt>ShepardsColorInterpolate</dt>

      <dt>VoronoiColorInterpolate</dt>

      <dt>InverseColorInterpolate</dt>
    </dl>

    <h3 class="const" id="SpreadMethod">SpreadMethod</h3>

    <dl>
      <dt>UndefinedSpread</dt>

      <dt>PadSpread</dt>

      <dt>ReflectSpread</dt>

      <dt>RepeatSpread</dt>
    </dl>

    <h3 class="const" id="StretchType">StretchType</h3>

    <p>See <a href="draw.html#font_stretch_eq">font_stretch=</a>.</p>

    <dl>
      <dt>NormalStretch</dt>

      <dt>UltraCondensedStretch</dt>

      <dt>ExtraCondensedStretch</dt>

      <dt>CondensedStretch</dt>

      <dt>SemiCondensedStretch</dt>

      <dt>SemiExpandedStretch</dt>

      <dt>ExpandedStretch</dt>

      <dt>ExtraExpandedStretch</dt>

      <dt>UltraExpandedStretch</dt>

      <dt>AnyStretch</dt>
    </dl>

    <h3 class="const" id="StorageType">StorageType</h3>

    <p>See <a href="image2.html#import_pixels">import_pixels</a> and <a href="image2.html#export_pixels_to_str">export_pixels_to_str</a>.</p>

    <dl>
      <dt>CharPixel</dt>

      <dd>corresponds to a C <code>unsigned char</code>, range 0-255.</dd>

      <dt>ShortPixel</dt>

      <dd>corresponds to a C <code>unsigned short</code>, range 0-65535.</dd>

      <dt>IntegerPixel</dt>

      <dd>corresponds to a C <code>unsigned int</code>, range 0-4294967295.</dd>

      <dt>LongPixel</dt>

      <dd>corresponds to a C <code>unsigned long</code>, range 0-4294967295 (for 32-bit longs).</dd>

      <dt>FloatPixel</dt>

      <dd>corresponds to a C <code>float</code>, range 0.0-1.0.</dd>

      <dt>DoublePixel</dt>

      <dd>corresponds to a C <code>double</code>, range 0.0-1.0.</dd>

      <dt>QuantumPixel</dt>

      <dd>corresponds to the Quantum type used by ImageMagick, range 0-QuantumRange.</dd>
    </dl>

    <h3 class="const" id="StyleType">StyleType</h3>

    <p>See <a href="draw.html#font_style_eq">font_style=</a>.</p>

    <dl>
      <dt>NormalStyle</dt>

      <dt>ItalicStyle</dt>

      <dt>ObliqueStyle</dt>

      <dt>AnyStyle</dt>
    </dl>

    <h3 class="const" id="VirtualPixelMethod">VirtualPixelMethod</h3>

    <dl>
      <dt>UndefinedVirtualPixelMethod</dt>

      <dt>EdgeVirtualPixelMethod</dt>

      <dt>MirrorVirtualPixelMethod</dt>

      <dt>TileVirtualPixelMethod</dt>

      <dt>TransparentVirtualPixelMethod</dt>

      <dt>BackgroundVirtualPixelMethod</dt>

      <dt>DitherVirtualPixelMethod</dt>

      <dt>RandomVirtualPixelMethod</dt>

      <dt>MaskVirtualPixelMethod</dt>

      <dt>BlackVirtualPixelMethod</dt>

      <dt>GrayVirtualPixelMethod</dt>

      <dt>WhiteVirtualPixelMethod</dt>

      <dt>HorizontalTileVirtualPixelMethod</dt>

      <dt>VerticalTileVirtualPixelMethod</dt>

      <dt>HorizontalTileEdgeVirtualPixelMethod</dt>

      <dt>VerticalTileEdgeVirtualPixelMethod</dt>

      <dt>CheckerTileVirtualPixelMethod</dt>
    </dl>

    <h3 class="const" id="WeightType">WeightType</h3>

    <p>
      The font weight can be specified as one of 100, 200, 300, 400, 500, 600, 700, 800, or 900, or one of the following constants. See
      <a href="draw.html#font_weight_eq">font_weight=</a>.
    </p>

    <dl>
      <dt>AnyWeight</dt>

      <dd>No weight specified.</dd>

      <dt>NormalWeight</dt>

      <dd>Equivalent to 400</dd>

      <dt>BoldWeight</dt>

      <dd>Equivalent to 700</dd>

      <dt>BolderWeight</dt>

      <dd>Increases weight by 100</dd>

      <dt>LighterWeight</dt>

      <dd>Decreases weight by 100</dd>
    </dl>

    <p class="spacer"></p>

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